Wood flour polyhydroxy surface structure is a polar hydrophilic substance, while the polymer is generally apolar lipophilic substances, both difficult compatibility, the affinity is poor. Such as a simple will direct both blended products brittle, poor mechanical properties, not practical. Such as by grafting reaction of wood flour surface treatment can be an OH group on the grafted wood fiber organic group, make flour the surface becomes surface lipophilic substances, improve the interface adhesion with polymer macromolecules force, but also to wood flour in the composite material more evenly distributed, form a dense network structure,

Thereby increasing the tensile and impact strength of the composites. The results show that different types of polymers, the appropriate With a surface treatment agent it is completely different. Such as wood flour / polypropylene system, polypropylene grafted with maleic anhydride, the effect of treatment is better, but the wood flour / polyethylene system effect is not significant. The ethylene-acrylic acid copolymer (EAA) is much better, even though flour content of 6O, the tensile strength of the composite material is also close to the value of pure resin. For Wood / PVC aluminum coupling agent does not meet the requirements, a silane coupling agent, although better, but the price is expensive. Langfang City Shenlong Gimhae Development Co. sold activation coupled improve compatibility as one of the complex effect on the better surface treatment agent, can effectively solve the problem of surface-treated wood flour and PVC macromolecules affinity and compatibility.